CW713R (CuZn37Mn3Al2PbSi) Self-Lubricating Bronze Bearings

High-Performance CW713R (CuZn37Mn3Al2PbSi) Self-Lubricating Bronze Bearings for Precision CNC Applications， High-strength brass alloy

In modern mechanical engineering, the demand for high-strength, wear-resistant, and maintenance-free components is constantly rising. CW713R (CuZn37Mn3Al2PbSi), a high-performance aluminum bronze alloy, has emerged as a preferred choice for final machined CNC self-lubricating bronze bearings, offering a perfect balance of durability, precision, and reliability.

CW713R – High Tensile Brass (CuZn37Mn3Al2PbSi) for Durable Bearings and Wear Components， C 67400, Cu Zn 40 Al2, CW 713 R

CW713R, also known as CuZn37Mn3Al2PbSi, is a high tensile brass alloy that has been specially engineered for demanding mechanical applications. By alloying traditional brass with strength-enhancing elements such as aluminum, manganese, and silicon, CW713R achieves a performance level comparable to aluminum bronze, while remaining significantly easier to process and machine.

Key Advantages of CW713R

• High Strength: Near aluminum bronze-level hardness makes it suitable for high-load applications.

• Excellent Machinability: Easier to process than aluminum bronze, reducing production time and costs.

• Corrosion and Wear Resistance: Maintains performance even in harsh environments, extending component lifespan.

These properties make CW713R an ideal material for maintenance-free and high-performance components.

Typical Applications

CW713R is widely used in industries requiring durable, high-load, and low-friction components, including:

• Bearings for high-load applications

• Slide and wear plates

• Valve guides

• Piston parts

Its self-lubricating properties in certain designs further enhance reliability and service life, particularly in hydraulic and mechanical systems.

Available Shapes and Forms

CW713R can be supplied in a variety of standardized shapes for CNC machining or precision manufacturing:

• Solid round bars

• Tubes

• Hexagonal bars

• Flat bars

This versatility allows engineers to select the best form for their specific application, optimizing material usage and machining efficiency.

Conclusion

For engineers and designers seeking a high-strength, wear-resistant, and machinable alloy, CW713R (CuZn37Mn3Al2PbSi) offers the perfect balance of performance and manufacturability. Its suitability for bearings, valve guides, pistons, and wear components makes it a reliable choice across automotive, industrial machinery, and hydraulic applications.

What is CW713R?

CW713R is a complex copper-zinc-aluminum-manganese-silicon alloy, designed to combine the toughness of bronze with excellent wear resistance. Its chemical composition includes:

• Copper (Cu): 57–59%

• Zinc (Zn): Balance

• Aluminum (Al): 1.3–2.3%

• Manganese (Mn): 1.5–3.0%

• Lead (Pb): 0.2–0.8%

• Silicon (Si): 0.3–1.3%

This combination gives CW713R outstanding mechanical and physical properties, making it ideal for high-load and high-wear applications.

Key Properties for CNC Machining

CW713R is particularly well-suited for final machined CNC components, including bearings, because of its:

• High tensile strength: ≥ 540 MPa

• Yield strength: ≥ 280 MPa

• Elongation: ≥ 15%

• Brinell hardness: ~150 HB

These properties allow CW713R bearings to withstand heavy loads without deformation, even in demanding industrial environments.

Self-Lubricating Advantages

One of the most remarkable features of CW713R bearings is their self-lubricating capability, achieved through precise alloying and microstructure control. Benefits include:

• Reduced maintenance: No need for frequent oiling or grease, saving time and cost

• Lower friction: Minimizes wear on both the bearing and shaft

• High load tolerance: Can handle high contact pressures without galling

• Extended service life: Especially in harsh environments where traditional lubricants fail

This makes CW713R self-lubricating bearings ideal for hydraulic systems, automotive components, pumps, and high-speed machinery.

Why Final Machined CNC Bearings?

CNC machining ensures precise dimensions and tight tolerances for CW713R bearings. Final machined bearings provide:

• Optimal surface finish: Reducing friction and wear

• High dimensional accuracy: Critical for assembly and smooth operation

• Consistency: Every bearing performs reliably in high-load applications

Combining CW713R’s alloy advantages with precision CNC machining guarantees bearings that meet the most demanding performance requirements.

Applications Across Industries

CW713R self-lubricating bronze bearings are widely used in:

• Industrial machinery: Sliding bearings, gear supports, guides

• Automotive: Transmission components, high-load bushings

• Hydraulic systems: Pumps, valves, pistons

• Heavy-duty engineering: Bearings for presses, cranes, and construction equipment

Conclusion

For engineers and designers seeking durable, high-performance, maintenance-free bearings, CW713R (CuZn37Mn3Al2PbSi) final machined CNC self-lubricating bronze bearings are an ideal choice. Their combination of strength, wear resistance, and self-lubricating performance ensures reliable operation in demanding industrial environments while reducing maintenance costs.

CW713R – High-Strength Brass (CuZn37Mn3Al2PbSi) for Bearings and Wear Components

CW713R (CuZn37Mn3Al2PbSi) is a high-strength brass alloy engineered for high-load, wear-resistant applications. By alloying copper-zinc with aluminum, manganese, silicon, and lead, CW713R achieves mechanical properties comparable to aluminum bronze while maintaining excellent machinability and corrosion resistance.

Chemical Composition

CW713R’s nominal chemical composition ensures high strength and durability:

• Copper (Cu): 57 – 59 %

• Zinc (Zn): Balance

• Manganese (Mn): 1.5 – 3.0 %

• Aluminum (Al): 1.3 – 2.3 %

• Lead (Pb): 0.2 – 0.8 %

• Silicon (Si): 0.3 – 1.3 %

Maximum impurities:

• Iron (Fe): < 1.0 %

• Tin (Sn): < 0.4 %

• Nickel (Ni): < 1.0 %

• Others: 0.5 %

Mechanical Properties

CW713R delivers outstanding mechanical performance for demanding applications:

• Yield strength (Rp): 320 N/mm²

• Tensile strength (Rm): 540 N/mm²

• Elongation (A5): 12 %

• Hardness (Brinell): 160 HB

• Density: ~8.1 g/cm³

Mating material requirements: Min. surface hardness 350 HB, recommended surface roughness <1 Ra, ensuring optimal wear resistance and longevity.

Applications

CW713R is ideal for components exposed to high loads and sliding wear, including:

• Bearings for high-load applications

• Slide and wear plates

• Valve guides

• Piston parts

Its self-lubricating behavior in certain designs further enhances reliability in hydraulic, automotive, and industrial machinery.

Availability

In addition to standard warehoused bronze alloys, we can also offer high-strength brass CW713R upon request. Available shapes include: Bushing, Flange, Washer

• Standard Short Shoulder Bushings Metric deliver precise positioning and reliable support in guide systems, facilitating smooth motion while optimizing performance. Their durable construction reduces wear and extends equipment lifespan in demanding industrial applications. These bushings protect sensitive machinery and automation systems, ensuring enhanced reliability and efficiency without compromising operational performance.

Please contact us for more details to discuss your specific requirements and custom orders.